Config file (optional):
The config.lua file can be edited and put in ux0:/data/luaIrc to change some default settings:
nick_default = Default nickname that will be shown at startup. (Default: PSN Nickname)
server_default = Default server hostname that will be shown at startup. (Default: Freenode)
channel_default = Default channel name that will be shown at startup. (Default: #henkaku)
save_log = Enable/Disable history logs saving at ux0:/data/luaIrc/logs.txt (Default: false)

Credits:
StepS for helping me understanding how PART and QUIT commands work.